Pipe coupling



March 28, 1944. ARMlNGTON r g- Re. 22,459 I PIPE COUPLING Original FiledDec. 2l, 1940 FIG-l,

I Fla-4 Reiseued Mar.28, 1944 I Rs. 22,459

PIPE COUPLING George E. Armington, South Euclid, and

Raymond Q. Armington,

Shaker Heights,

Ohio, assignors to The Euclid Road Machinery Company, Euclid, Ohio, in.corporation oi Ohio Original No. 2,318,575, dated May 11. 1943, SerialNo. 371,193, December 21, 1940. Application for reissue December 2,1943, Serial No. 512,658

Claims.

This invention relates to improvements in pipe couplings adapted-tolwithstand heavy prest An object of the present invention is toprovide a pipe coupling utilizing a compressible washer or gasket whichis more tightly compressedto seal he joint the greater the pressurebecomes. Furt ermore our improved invention requires very few parts andis easy to manufacture and assemble.

Other objects and advantages of the invention will appear from theaccompanying drawing and descriptions and the essential feature thereofwill be set forth in the claims.

In the drawing, Fig. 1 is a central longitudinal sectional view throughour improved coupling; Big. 2- is a sectional view taken along the line2-! of Fig. 1; while Figs. 3 and 4 are plan views of two of the ringsshown-in Fig. 1. 4

Referring first to Fig. 1, a housing or othe structure to which the pipeis to be coupled is indicated at II having formed therein, in suitablebosses or otherwise. a recess I! having at its inner end a'frustoconical surface Ila diverging outwardly and a threaded portionIII: at the outer end oi the recess. The pipe ll which isto be connectedto the housing in a leakproot man- 'ner is provided with an annulargroove at Ila.

housing will press ring it into recess Ila when nut II is tightened. Thediameter of the ring at I the point Ilc is adaptedtoslide on the outsidediameter oipipe Il. At II are indicated list annular metal washersbetween which is an annular washer or gasket II oi. rubber orotherompressible material adaptedtoflt i'airly closelybetweenthepipellandtherecesslllnthehousins. A wedge ring II has aninternal diameter adapted to slide on pipe II and is provided with ai'rustoconical 'suri'ace IIa conversing outwardlyertowardtherightasviewedinliig. lsndcompiementarytoasimilarsuri'acellaonapacking not II which engages the threads Ilb ot the housingrecess.

slipped on the pipe I3 in the order shown in Fig. 1, the lock ring itbeing the last member in position and adapted to be snapped in grooveIla because of the split ring construction shown in Fig. 3. The partsare then placed in position in the housing II as shown in Fig. 1 and thepacking nut II engaged with the threads Ilb. The wedge ring I! squeezesthe gasket I. against the lock ring it causing a very tight engagementbetween the gasket and pipe IlIon one hand and between the gasket andthe recess ll of the housing II onthe other hand. The emciency oi thisJoint is so great that, using a i" pipe as indicated at ll, thepackingnut II when tightened by hand will provide aioint adapted towithstand a pressure of 1,000 pounds per'square Inch without leakage. I

By the use of our improved pipe coupling connections may be cheaply madeby the use oi few parts of simple design. If a leak occurs at any Jointit is only necessary to tighten up .on the packing nut II to stopleakage and ii a new gasket is necessary a single joint may bedisassembled without disconnecting the other Joints along the pipe as isthe case where the customary unions or pipe couplings are used. There issuflicient clearance between the metal parts of our improved coupling sothat there is no difliculty about the alinement oi the joint.

It will be noted upon an inspection of Fig. 1, that iiuid pressure inthe system exerts an unbalanced eiiect upon the exposed end oi pipe llat the point Il. Obviously when this pressure is extremelyhigh there isa tendency to move pipe I! toward the right as viewed in Fig. 1 andbecause of the tight engagement between the pipe and the lock ring itthis pressure is exerted againstthesealinggasket Ilsoasto increase thesealing eilect What we claim is: 1. In a pipe coupling, inner'and'outertelescoping tubular members, a deformation in the outer In the use oiour invention the parts are as wall oi said inner member where it lieswithin the outer member, alock ring lying between said members andengaging said deformation, said lock ring having internal dimensionspermitting it to passover the end of said inner member lying within theouter-member, a packing nut embracing said innermember and havingthreaded engagement with said outer member for drawing said nut towardsaid lock ring, and an annular ring oi compressible sealing materialsnugly fltting between and members and compressed between said nut andsaid lock ring, said inner.

tubular member being iree'to slide relative to said outer tubular memberin member-separating direction, whereby said lock ring will compresssaid sealing material. 3

' 2. In a pipe coupling, inner and outer telescoping tubularmembers,there being a recess in the outer wall of said inner memberwhere it lies within the outer member, a split lock ring adapted toslide over the end of said inner member iying within the outer member,there being a lip on said lock ring adapted to enter said recess, apacking nut embracing said inner member and having threaded engagementwith said outer member for drawing said nut toward said lock ring, andan annular ring of compressible seal- 7 ing mateiral snugly fittingbetween said members and compressed between said nut and said lock a lipon said lock ring adapted to enter said recess, a packing nut embracingsaid inner member and having threaded engagement with said outer memberfor drawing said nut toward said lock ring, and an annular ring ofcompressibleseallng material snugly fitting between said members andcompressed between said nut and said lock ring, said inner tubu armember being eases thereof which lies within the outer member, saidouter member having an inside wall diverging radially outward and awayfrom said end of said inner member the iollowing parts being adapted .toslip over said endoi said inner member and ment with said outer memberfor drawing the ward said inner member when said nut is tightnut towardsaid end of said inner member, there, being a part on said lock ringadapted'to enter said recess, there being a surface on said lock :ringcomplementary to said diverging wall-oi said outer member for urgingsaid lock ring toened, and there being coacting surfaces on said wedgering and packing nut for urging saidwedge ring toward said inner memberwhen said nut is tightened.

5. In a pipe coupling, inner and outer telescoping tubular members,there being a recess in the outer wall of said inner member where itlies within the outer member, a split lock ring adapted her for drawingsaid nut toward said lock ring,

tree to slide relative to said outer tubular mem- 1 bar inmember-separating direction, whereby said lock ring will compress saidsealing material, coacting' parts between said outer member and and anannular ring of compressible sealing material snugly fitting betweensaid members and compressed between. said nut and said look ring, saidinner tubular member being tree to slide relative to said outer tubularmember in membar-separating direction, whereby said lock ring .willcompress said sealing material, there being said lock ring for urgingsaid lock ring into said recess as said packing nut is tightened.

GEORGE E. ARMZINGTON. RAYMOND Q. ARMINGTON.

